How old is Hillary Clinton? The question is trending in light of the former first lady throwing her hat into that proverbial presidential contender’s ring on Sunday. In doing so, she has confirmed what is being called the ‘worst-kept secret in politics.’ Everyone has long assumed that Hillary Clinton would run for the Democratic party.

“I’m getting ready to do something too,” Hillary Clinton said more than 90 seconds into the video she shared with her constituents on Sunday. “I’m running for president.”

“Every day Americans need a champion, and I want to be that champion,” she continues, urging Americans by saying, “It’s your time.”

Is she pretty much guaranteed the Democratic nomination? The Atlantic says yes. They report that “journalists are gearing up for Clinton’s likely primary victory and preparing for a long working relationship.”

Road trip! Loaded the van & set off for IA. Met a great family when we stopped this afternoon. Many more to come. -H pic.twitter.com/5Va7zeR8RP

— Hillary Clinton (@HillaryClinton) April 13, 2015

So back to that question. Just how old is Hillary Clinton? She is 67. Born Hillary Diane Rodham on October 26, 1947, she is 21 years younger than her husband, former President Bill Clinton, was when he took office.

Is Hillary Clinton too old to run? No. Mitt Romney was in his sixties when he ran for president in 2012. John McCain was 70 when he ran in 2008.

Hillary Clinton wasn’t too old to be the Secretary of State under President Barack Obama. That’s a job she held from 2009 to 2013.

Hillary Clinton is old enough to be mom to Chelsea and a grandmother to Charlotte Clinton Mezvinsky.

Very proud of you Mom! @HillaryClinton: http://t.co/PvMlg82cU2

— Chelsea Clinton (@ChelseaClinton) April 12, 2015

So how old is Hillary Clinton? Age is just a number, after all. She seems full of energy and determination. She clearly isn’t too old to pursue her dream–becoming the first female president of the United States.